MT_Plane3.inl

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#include "MT_Optimize.h"


GEN_INLINE
MT_Plane3::
MT_Plane3(
    const MT_Vector3 &a,
    const MT_Vector3 &b,
    const MT_Vector3 &c
){
    MT_Vector3 l1 = b-a;
    MT_Vector3 l2 = c-b;

    MT_Vector3 n = l1.cross(l2);
    n = n.safe_normalized();
    MT_Scalar d = n.dot(a); 

    m_co[0] = n.x();
    m_co[1] = n.y();
    m_co[2] = n.z();
    m_co[3] = -d;
}

GEN_INLINE
MT_Plane3::
MT_Plane3(
    const MT_Vector3 &n,
    const MT_Vector3 &p
){
    
    MT_Vector3 mn = n.safe_normalized();
    MT_Scalar md = mn.dot(p); 

    m_co[0] = mn.x();
    m_co[1] = mn.y();
    m_co[2] = mn.z();
    m_co[3] = -md;
}


GEN_INLINE
MT_Plane3::
MT_Plane3(
):
    MT_Tuple4()
{
    m_co[0] = MT_Scalar(1);
    m_co[1] = MT_Scalar(0);
    m_co[2] = MT_Scalar(0);
    m_co[3] = MT_Scalar(0);
}

GEN_INLINE
    MT_Vector3
MT_Plane3::
Normal(
) const {
    return MT_Vector3(m_co[0],m_co[1],m_co[2]);
}

GEN_INLINE
    MT_Scalar
MT_Plane3::
Scalar(
) const {
    return m_co[3];
}

GEN_INLINE
    void
MT_Plane3::
Invert(
) {
    m_co[0] = -m_co[0];
    m_co[1] = -m_co[1];
    m_co[2] = -m_co[2];
    m_co[3] = -m_co[3];
}


GEN_INLINE
    MT_Plane3 &
MT_Plane3::
operator = (
    const MT_Plane3 & rhs
) {
    m_co[0] = rhs.m_co[0];
    m_co[1] = rhs.m_co[1];
    m_co[2] = rhs.m_co[2];
    m_co[3] = rhs.m_co[3];
    return *this;
}

GEN_INLINE
    MT_Scalar
MT_Plane3::
signedDistance(
    const MT_Vector3 &v
) const {
    return Normal().dot(v) + m_co[3];
}